Cooling system / radiator fans

Asked by Mar 31, 2017 at 01:11 PM about the 2005 Subaru Legacy 2.5i

Question type: Maintenance & Repair

So yesterday I was driving back from the
store and driving about 25 to 35 mph. I
stopped at the gas station on my way
home and noticed steam coming from my
engine. When I popped my hood my
radiator cap was off due to the pressure.  
My temperature gauge never registered
that I was hot, but I had no coolant in my
reservoir and my fans were not spinning.
Now I'm not sure if this happened  
because I was low on coolant wear it
because my fans were not operating
properly to cool down my radiator.  The
reason why I question if it was the fans is
because at highway speed (45mph and up)
I did not notice any difference. Has
anybody else had this problem before if so
do you know what the fix is?

16 Answers

85,955

I cant' say for sure what is going on with your car but if your coolant is really low the temperature sensor may not pick up the heat and turn on the fans. I would have your cooling system checked for leaks and perform a full system maintenance - hoses, flush, new coolant etc. Once the system is full of coolant, check to see if the cooling fans come on when the engine gets hot.

When I purchased the car the previous owner told me that they had to constantly put coolant in so I'm pretty sure there is a small leak somewhere. I was too scared to damage anything internally in the engine so I didn't try to drive it really hard after I refill the reservoir. If I were to turn on my AC at idle , and my fans kicked on would that rule that out ?

85,955

The first order of business is to fix the leak!!!

85,955

If the leak is from a bad head gasket (high probability) you will need to replace them. Use Subaru brand anti-leak in the radiator, it might help if the leak is very small.

How do you tell if the leak is coming from the head ?

10,900

How long have you had this car? I suspect that if you had this car for a while and it hasn't happened before then the radiator cap was the culprit. Radiator caps usually don't come off from overheat so if it was off then it probably was not replaced properly. When you refill the system be sure to put COOLANT back in and not just water

1 of 1 people found this helpful.

I've had the car for a week. I asked the previous owner of this is happened before and she said it has never happened. I refill the reservoir which nothing but coolant and have yet to drive it since

10,900

I know this advice is not well accepted with some members but the fact your driving a 12 year old car and head gaskets ain't cheep ,, I would try the old "Hail Mary" fix and #1 buy a new radiator cap #2 get Barrs leak stopper ,, then put it in the radiator. Odds may be good that it works BTW a perty sure way to tell if the gasket is blown is after the engine is hot (like about 10 miles) see if you exhaust has a lot of vapor ... put your hand close to it and see how much condensation you get ... check your oil, does it smell funny or look foamy?

The car is never had overheating problems just the small coolant leak that I know of. So I will more than likely replace the radiator cap and add that in and see if it works before I go on replacing anything else. And last time I looked at the oil ( a few days ago) it looked fine. No discoloration or foam

85,955

Bars Leak is nasty stuff. I would use the Subaru brand anti-leak or Alumaseal.

Why do you say that ?

10,900

Barrs leak has always worked for me but other products may be just as good

85,955

Have you ever seen Bars Leak? If so you would know what I mean plus people have told me it plugged up their radiator. I have had a 100% success rate for many, many years with the two products I mentioned.

10,900

If it were that bad it wouldn't be one of the top selling products /// in addition to that ,,, I told the gentleman to use whatever he feels is best Please use my email to discuss disagreements .. you confuse the people we are trying to help

6,140

Calm down, guys. The odds are indeed that the coolant leak is from #4 cylinder, requiring chronic supervision leading eventually to full HG replacement when the leak progresses, or is joined by an OIL leak from the opposite (right) head. There's onlyt a very small possibility that coolant loss is from a loose old clamp or seepage past a seal or wp bearing, in which case the Hail Mary of Bar's or similar (doesn't matter which...just don't use goopy oatmeal) could help. (Subie's red version isn't any better than Bar's...just pricier.) Tyler, if you get a light down under the left windshield to look DOWN at the rear corner of the left head you'll probably see active seepage or residue from seepage when cold overnight. That will confirm your diagnosis. Again, eventually the leak will progress so that it doesn't just seep out via gravity over night, but when parked and eventually actively driving. It is EXTREMELY important to NEVER run the radiator coolant level low, so if the overflow reservoir is empty be sure to fill the radiator EVERY TIME rather than just adding to the external tank; too many times folks run around with a full expansion tank and an empty radiator, blowing the head gaskets wide open indeed! Note also that if the former's happened you may also have now an INTERNAL (high pressure) hg broach which will percolate the coolant from the radiator out through the expansion tank and onto the ground. This will confuse you, as it's a different type of HG failure...but can NEVER be nursed along by adding coolant or any additive. But the first "slow" coolant loss can limp along for a few months-to-years if you're a good "wet nurse". Good luck.

6,140

PS The rad caps are very rarely bad, but high pressure percolation can ruin the rubber gasket and blow it off. That's another hint that the HGs are compromised internally indeed.

Your Answer

Legacy

Looking for a Used Legacy in your area?

CarGurus has 15,120 nationwide Legacy listings starting at $1,795.

ZIP:

Subaru Legacy Experts

  • #1
    Anthony_60
    Reputation
    1,270
  • #2
    Nick Eidemiller
    Reputation
    740
  • #3
    dandyoun
    Reputation
    730
View All

Related Models For Sale

Used Subaru Impreza
211 Great Deals out of 22,591 listings starting at $1,505
Used Subaru Outback
426 Great Deals out of 36,167 listings starting at $1,000
Used Subaru Forester
404 Great Deals out of 38,678 listings starting at $1,000
Used Honda Accord
1,104 Great Deals out of 73,074 listings starting at $1,100
Used Subaru Impreza WRX
40 Great Deals out of 1,180 listings starting at $1,500
Used Toyota Camry
1,117 Great Deals out of 86,589 listings starting at $800
Used Honda Civic
789 Great Deals out of 60,730 listings starting at $950
Used Subaru Impreza WRX STI
27 Great Deals out of 629 listings starting at $9,490
Used Ford Fusion
1,040 Great Deals out of 63,047 listings starting at $888
Used Nissan Altima
1,322 Great Deals out of 77,543 listings starting at $1,695
Used Audi A4
338 Great Deals out of 12,503 listings starting at $1,899
Used BMW 3 Series
1,129 Great Deals out of 32,630 listings starting at $1,200
Used Toyota RAV4
844 Great Deals out of 52,198 listings starting at $1,600

Used Cars For Sale

2018 Subaru Legacy 2.5i For Sale
1,549 listings starting at $19,672
2017 Subaru Legacy 2.5i For Sale
3 Great Deals out of 138 listings starting at $16,499
2016 Subaru Legacy 2.5i For Sale
3 Great Deals out of 53 listings starting at $11,495
2015 Subaru Legacy 2.5i For Sale
14 Great Deals out of 221 listings starting at $10,950
2014 Subaru Legacy 2.5i For Sale
8 Great Deals out of 129 listings starting at $6,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.